welcome redditors!to snoo-finity ... and beyond!

NBME 20 Answers

nbme20/Block 4/Question#39

A 30-year-old woman develops serum sickness ...

C3a

Login to comment/vote.

FA 2019 pg 400:

Mast cells... can be activated by tissue trauma, C3a and C5a, surface IgE cross-linking by antigen (IgE receptor aggregation) --> degranulation --> release of histamine, heparin, tryptase, and eosinophil chemotactic factors.